Great for done in a day activities
great outer layer for cool (50-60'weather) single day crag adventures or long day multipitch endeavors. Size according to your desired use: as solely an outer layer size up, for use as an outer layer and as a middle layer beneath a belay jacket size down. I use it as an outer layer for moderate weather but desire a smaller fit for wear underneath a belay jacket and trad gear. I wear a size small (507,160 40 inch chest.)

Best Fleece out there
After picking up the Theta AR shell, I chose this fleece as the insulation for it. The fit is perfect and the mobility is great. Being 200wt Polartec, this jacket was enough to get me through a Northeast winter, but light enough for milder spring temps. If you get it wet, don't worry, it dries almost instantly. The sides are Malden Powershield and refuse to rip. If you plan on climbing with the jacket on, you'll like that it's cut higher in the front for a harness. There really is no flaw with this jacket, but at first I didn't like the pockets cut low. I thought they kinda got in the way of a backpack hip belt, but with a little adjusting, there is no problem. If you need a good fleece, this is the one you should get.